Big-game fishing is a popular sporting activity that involves catching large fish, such as marlin, tuna, and swordfish. If you are looking for synonyms for big-game fishing, you might consider deeper sea fishing, blue water fishing, or sport fishing. These terms are often used interchangeably to describe the same activity, but they may differ slightly in terms of the size and type of fish being targeted. Additionally, you might hear the terms game fishing or offshore fishing, which can also be used to describe the pursuit of big fish in open waters. Regardless of the terminology used, big-game fishing remains a thrilling and exciting pastime for many fishing enthusiasts.